Flesh out URLLoader's download_to_file function....

chrome/browser/renderer_host/redirect_to_file_resource_handler.h

Index: chrome/browser/renderer_host/redirect_to_file_resource_handler.h
===================================================================
--- chrome/browser/renderer_host/redirect_to_file_resource_handler.h	(revision 60837)
+++ chrome/browser/renderer_host/redirect_to_file_resource_handler.h	(working copy)
@@ -21,6 +21,10 @@
 class GrowableIOBuffer;
 }
 
+namespace webkit_blob {
+class DeletableFileReference;
+}
+
 // Redirects network data to a file.  This is intended to be layered in front
 // of either the AsyncResourceHandler or the SyncResourceHandler.
 class RedirectToFileResourceHandler : public ResourceHandler {
@@ -71,11 +75,14 @@
   bool buf_write_pending_;
   int write_cursor_;
 
-  FilePath file_path_;
   scoped_ptr<net::FileStream> file_stream_;
   net::CompletionCallbackImpl<RedirectToFileResourceHandler> write_callback_;
   bool write_callback_pending_;
 
+  // We create a DeletableFileReference for the temp file created as
+  // a result of the download.
+  scoped_refptr<webkit_blob::DeletableFileReference> deletable_file_;
+
   DISALLOW_COPY_AND_ASSIGN(RedirectToFileResourceHandler);
 };